Expansion-bolt.



H. W. MOWER.

EXPANSION BOLT.

APPLIOATION FILED Fmm, 1912.

25 H n: Z1 lV-" i Mnesses:

Patented July f a 24 UU A 16 sa 36 c' 5g d M d WW WW .75' 37 5a .5248 51341;? vena),

fw, M www .5o/of the .shield member as cast, or before be- HERBERT W. MOWER, OF NEWARK,.NEW JERSEY.'

ExrANsIoN-BOLT.

Specicationof Letters Patent.

Patented July 23, 1912'.

Application ledlebruary 8, 1912. Serial No. 676,232.

To ad whom t may concern Be it known that I, HERBERT W. lV IowE n, a citizen of the United States, residing 111 Newark, in the county of Essex and Statev of New Jersey, have invented certain new and useful Improvements in Expansion- Bolts, of which the following is a specifica tion.

The object of this invention is to provide an improved form of expansion bolt, or improved form of shield and nut member for the struct-ure, whereby the two sections of the shield member are retained in position for insertion in the hole by an integral connection, thereby obviating the use of an additional member besides the usual bolt and nut member.

A further object is to provide such structur whereby it can be readily formed by casting, such as of malleable iron, and easily -bent 'to the desired form by 4suitable means, such as dies, without undue strain on the connecting part.

A further object of the invention is to provide an end wall for engaging the extremity of the bolt across practically the entire face, so that the thread will not be mutilated when the bolt engages this end port-ion to advance the nut member.

A further object is to provide an improved arrangement of the inclined or wedge-like walls of the two sections for engagement with the usual conical or tapering nut member.

Another object is to provide an arrangement of the shield sections, and also of the nut member, whereby the sections are expanded at vboth ends, or at dierent portions, by the'same movement of the nut member.

In the accompanying drawings representing embodiments of my invention, Figure 1 is a longitudinal section through the device expanded in the opening in the wall. Fig. 2 shows a side elevation of the structure as placed in the wall and before the bolt has drawn the nut back to expand the sleeves.v

Fig. 3' is anelevation of the parts in the position shown in Fig. 1. Fig. 4 is a plan view ing bent up to the cylindrical position. f Fi'g. 5 is a view of the larger end of the nut meme ber. Fig. 6 is a longitudinal section-through the nut member, and Fig. 7 is a viewfof the smaller end of the nut member.- Fig. Sis

an inneriend view of the shield member shown in Fig. 4, and Fig. 91s Ian outer end .view of the same. Fig. 10 is a longitudinal section through a modification, and Fig. 11 shows the shield member used in the construction shown in Fig. 10.

The shield member 15 is somewhat of the usual construction comprising a sleeve forned in two sections cut on a longitudinal axial plane, that when brought together form a tube to vbe expanded by a tapering nut member. Heretofore, these two sections were held together by suitable means, such as a split ring-'or the like to retain them for insertion into the aperture, yet which would permit them to expand by the nut member. To obviate the use of an additional member for holding the parts together, I provide an integral connection in the form of a strip 16, that in Fig. 4 is shown at the outer end of the sections. And this strip extends from a place 17 intermediate of the longitudinal edges of the section A, to a place 18 intermediate of the longitudinal edges of the section B, slots 19 and 21 separating the strip 16 on its side edge from the adjacent portions of the sections. This structure is preferably formed by casting, or else by dies, with the two sections A and B lying with their 'longitudinal edges in one plane, and theA strip 16 extending in a plane parallel therewith, as shown in Figs. 8 and 9. Such arrangement can be very readily Aformed by the usual method of casting. Then the two sections are brought together by curving the strip 16, that will follow a cylindrical contour of the shells as brought together, and form a substantially cylindrical member. Were the two sections connected directly at their adjacent longitudinal edges,

suchstrip would be very short, and would have to be given such a very sharp bend that vit would very likely break. But the great with theirvinner ywalls at some portion made tapering, or-conical, to engage a conical nut 21` which is preferably beyond the strip 16, and best locatedfat .the opposite end. The

usual formiof bolt 22 will draw the nut 20 outward against such tapered walls and cause .expansion of the shield sections in the ico ' only to the side edges of these sections, andl usual manner, that will be freely permitted b'y reason of the connecting strip 16 extending from the intermediate-or l,opposite portions of the shield.

' In order to vform a stop for the end of the bolt, I provide one of the sect-ions, as A, with an end wall 23` extending across the axis of the vshield member. In order that the strain on this end wall maybe also taken by the other section B, I provide an end wall 24 to this section t-hat engages the outer face of the 4said wall 23, the wall 24 extending located outside of the wall 23 when they are brought together. The said tapered walls of the sections are shownin oneform asv arranged at this end, and I .also provide in each section, preferably when cast, openings, as 25 and 426, at the intermediate or bottom portion of each section.' And the Wall of the section is formed taperingfrom the intermediate portion to this opening, as clearly shown in Figs. 1 and 10, to engage the correspondingly tapered portion of the Wedge member or nut 20. By having the two end Walls, 23 and 24, the use of the openings 25 and 26 does not weaken the structure so as to render it inoperative.

The nut member 2() Vis preferably formed oval or elliptical in section, as shown in Figs. 5 and 7. This nut member is inserted between the two sections A and B adjacent the end wall 23, before the parts are brought together by bending the strip 16. After such operation the nut member will be securely held inside of' the shield, and prevented from being displaced and lost,'and ready for the insertion of the usual bolt 22. Vhen the parts are to-gether, as shown in Fig. 2, it will beseen that the side edges of the shield sections are in rclose proximity at the inner end, but apart about 2, of an inch at the outer end. But when inserted in the hole in the wall, that is made about the size of the inner end of the shield, the section will be'forced to-gether at the outer end and will tightly grip the walls of thehole in the wall. Upon turning the bolt, the nut vwill be drawn outward and the sleeve sections forced apart thereby and into locking engagement' with the walls of the opening. The angle of the -nut and also of the tapered Walls in the sections, will cause a practically radially outward movement of the sections,

and the outer walls will remain substan' tially parallel. During this movement the end of the bolt will engage the end wall 23, and prevent inward movementof the bolt when it starts. At the same time, since this Wall extends entirely across the end of the bolt, it will not tend to strip the threads or injure the bolt, providing for the easy removal of the bolt when desired.

If desired, the wedge member or nut may be duplicated at another part of the shield. I-Ieretofore a pair of wedge members have been employed but they have operated bymovement in opposite directions. As shown, I provide a pair'of nut or wedge portions at dierent parts of the shield that operate inthe same direction of endwise movement. As shown in Fig; 10, I provide a double nut or wedge member having a conical portion 30 atone end corresponding tothe nut member 20, and at another portion a similar wedge member 31; these members preferably being connected by an integral sleeve 3 \.The sections 33 and 34 are provided with tapered wall portions 35 and 36 to engage with the said wedge member. Preferably the sections may have openings at 37 and 38,

oorresponding'with the said openings 25 and 26J at ythe end of the tapered wall in Fig. 4. From this construct-ion it will be seen thatwhen the bolt is turned the inner wedge member 30 that is threaded to engage the bolt is forced outward and will expand the sections in the usual manner. But the Wedge part 31, if integral with the part 30, willfmove in the same direct-ion land will therefore expand the l.outer portion of the sections. But if preferred, the connecting sleeve 32 can be a'separate member from the Wedge portions 30 and 31, and merely contact therewith. Yet it will be understood that if the vwedge or nut portion 30 is drawn outward by the bolt, thel sleeve willbe advanced and move the wedge portion 31 in `the same direction, and expand the sections.

Preferably 'these sections 33 and 34 are constructed with an integral connecting strip like the strip' 16. But with the double` wedge member-this strip is preferably ar.-` v

ranged at the middle portion, as sho-Wn in Fig. 11, 'where the sections C and D have an integrally connecting strip 40 extending from the intermediate portions of the twov sections. These sections are provided with the end walls 41 and 42 similar to the walls 23 and 24 in Fig. 4, and also provided with the openings'37 and 38 adjacent tapered portions 35 and 36 for engagement with the nut member 30. These sections may also be provided with openings 49 and 50 adjacent tapered portions 47 and 48 for engagement with the wedge portion 31 'at the intermediate portion of the shield. This latter structure possesses all of the advantages of simplicitythat vthe other one does, as the construct-ion of the shield member is practicallythe same, and the wedge or nut memberl is simply an elongated sleeve, or the same form of nut member provided with theadditional wedge member and a connecting sleeve. But obviously this form of double wedge member can be used without the integral connecting strip, and the sections held together by the usual split ring or other'means. y

Having thus described my *.vinvition, I'

tudinal edges of each section and alining with the cylindrical contour of the shell, whereby the sections are retained together and both coperating pairs of the longitudinal edges are entirely free to separate upon expansion of the shield.

3. A shield member for expansion bolts comprising a pair of sections having an integral connecting strip extending from each section at a place intermediate of the longitudinal edges of each section, whereby the sections are retained together and both pairs of the longitudinal edges are entirely free to separate upon expansion of the shield, one of the sections havin an integral circular portion arranged to c ose one end of the shield.

4. A shield member for expansion bolts comprising a pair of sections having an integral connecting strip extending from a place intermediate of the longitudinal edges of each section, whereby the sections are retained together and the longitudinal edges are entirely free to separate upon expansion of the shield, one of the sect-ions having an integral disk portion arranged to close one end of the shield, and a transverse wall carried by the other section and engaged by the outer wall of the disk on the said section.

5. A shield member for expansion bolts comprising a pair of sections, means for holding the sections together, one of the sections having an integral disk portion arranged to close one end of theA shield, and a transverse wall carried by the other section and engaged by the outer wall of the disk on the said section.

6. A shield member for expansion bolts comprising a pair of sections, each having an end wall and also an opening in the side adjacent the end wall, the said Wall of each section being made tapering from the intermediate part of the section to the edge of said opening to constitute opposed inclined walls, to cause expansion of the sections from a wedge member.

7. A shield member for expansion bolts comprising a pair of sections, each having an end wall and also an opening in the side adjacent the end wall, the said wall of each section being made tapering from the intermediate part of the sectionto the edge of said opening to constitute opposed inclined walls, to cause expansion of the sections from a wedge member, the sections having openings at an intermediate portion and also havingthe side walls formed tapering toward said latter openings in the same direction that said other Walls are tapered, to cause expansion of this part of the shield from another wedge portion moving in the same direction as said wedge portion.

8. A shield member for expansion bolts comprising a pair of sections, leach having an end wall and also an opening in the side adjacent the end wall, the said wall of each section being made tapering from the intermediate part of the section to the edge of sald opening to constitute opposed inclined walls, to cause expansion of the sections from a wedge member, the sections having openings at i an. intermediate portionv and also having the side walls formed tapering toward said latter openings in the same direction that said other walls are tapered, to cause expansion of this part of the 'shield from another wedge portion moving in the same direction as said wedge portion, said wedge portions being connected for simultaneous movement.

9. A shield member for expansion bolts comprising .a pair of sections, each having an end wall and also an openin in the side adjacent the end wall, the sai wall ot' each section being made tapering from the intermediate part of the sect-ion to the edge of said' opening to constitute opposed inclined walls, to cause expansion of the sec` tions from a wedge member, the sections having openings at an intermediate portion 'and also having the side walls formed tapering toward said latter openings in the same direction that said other Walls are tapered, to cause expansion of this part of the shield from another wedge portion moving lin the same direction as said wedge portion, said wedge portions being connected for simultaneous movement, said two wedge portions being formed integral.

10. A shield member for expansion bolts comprising a pair of sections, each having an end wall and also an opening in the side adjacent the end Wall, the said wall of each sect-ion being made tapering from the intermediate part of the section to the edge of said opening to constitute opposed inclined walls, to cause expansion of the sections from a wedge member, the sections having openings at an intermediate portion and also having the side walls formed tapering toward said latter openings in the same direction that said other walls are tapered, to cause expansion of this part of the shield from another wedge portion moving in the same direction as said wedge portion, the sections having an integral connecting strip 4. :naam

extending from a place intermediate vfrom the longitudinal edges of each section,

whereby such edges are free to separate upon expansion of the shield by the nut members. j

11. A shield member for expansion bolts comprising a pair of sections, each having an end wall and also an opening in the side adjacent the end wall, the said wall of each section being made tapering from the intermediate part of the section to the edge of said opening to constitute op osed inclined walls, to cause expansion o t-he sections from a Wedge member, the sections having openings at an intermediate portion and also having the side walls formed tapering toward said latter openings in the same di# rection that said other walls are tapered, to cause expansion of this part of the shield from another wedge portion moving in the same direct-ion as said wedge portion, the sections having an integral connecting strip extending from a place intermediate from the longitudinal edges of eachsection, whereby such edges are free to separate upon expansion of the shield by the nut members, said strip being located intermediate of the said wedge engaging portions of the sections.

12. An expansion bolt comprising a'shield formed of a pair of sections, athreaded bolt member, and a nut member having two conical portions tapered in the same direction,

the shield member having tapered portionscorresponding with the conical portions of the nut member whereby movement of the nut member by the bolt will cause expansion of the portions of the shield engaged by the nut members in the same direction.

13. An expansion bolt comprising a shield formed of a pair of sections, a threaded bolt member, and a nut member having two conical portions tapered in the same direction, the shield member having tapered portions corresponding with the conical portions of the nut member whereby movement of the nut member by the bolt will cause expansion .of the portions of the shield engaged bythe nut members in the same direction, yone of these sections of the shield having a transverse wall atthe end extendin across the inner end of t-he bolt.

14:. An expansion bolt comprising a shield formed of a pair of sections, a threaded bolt member, and a nut member having two conical portions tapered-in the same direction, the shield member having tapered portions corresponding with the conical portions of the nut member whereby movement of the nut member by the bolt will cause eXpansion ofthe portions ofthe shield vengaged by the nut members in the same directiomone of these sections of the shield having a transverse wall at the end extending across the inner end of the bolt, the other. of the outer face of said transverse wall.

15. An expansion bolt comprising a shield formed of a pair of sections, a threaded bolt member, and a nut member having two conical portions tapered in the same direction, the shield vmember having tapered portions corresponding with the conical portions of the nut member whereby movement of the nut member by the bolt will cause expansion of the portions of the shield engaged by the nut members in the same direction, one of these sections of the shield having a transsections having an end'.wall engaging the.

verse wall at the 'endjeXtending across the inner end of the bolt, the other of the sections having an end wall engaging the outer face of said transverse wall, the sections having an integral connect-ing strip extending from the place intermediate of the longitudinal edge of each of the sections, whereby such edges are free to-separate upon expansion of the shield.

HERBERT W. MOWER.

Witnesses:

WILLIAM H. REU), FRED J. DOLE. 

